Improvement in spring-motors



HQ BOLTON.

, Spring-Motor.

No. 163,447. PatentedMay18,1875.

UNITED STATES PATENT OFFICE.

HENRY BOLTON, or BRANTEORD, GANADAQ IMPROVEMENT IN SPRING-MOTORS.

Specification forming part of Letters Patent No. 163,447, dated May 18,1875; application filed March 17, 1875.

To all whom it may concern:

Be it known that I, HENRY BOLTON, of the town of Brantford,in the countyof Brant, in the Province of Ontario, Dominion of Canada, have inventedcertain Improvements in the Manner of Driving Sewing and other Machines,of which the following is a specification:

This invention relates to certain improvements in motors for drivingsewing-machines, 850.; and it consists in a means for utilizing thepower of a magazine spring through a secondary driving-spring, thetension of which driving-spring is, relatively, constant, and which saidsecondary spring is intermittently wound up by the magazine-spring asfast as it spends its force, and while it is in operation,

the two springs being so relatively constructed and arranged that theconstant tension of the secondary driving spring is less than theweakest tension of the magazine-spring at any stage of its operation, sothat the magazine-spring can always wind up the drivingspring. Amainshaft is actuated by the magazine-spring, and carries a rigidlyattached ratchet-wheel, a rigidly attached stop-wheel, and a loosecog-wheel, which latter is connected with the ratchet-wheel by thesecondary driving-spring, so that when the ratchetwheel is operated bythe magazine-spring, the said driving-spring is wound up and spends itsforce by revolving theloose cog-wheel which meshes with a train ofgear-wheels and furnishes the motive power. To prevent the continuousunwinding of the magazine-spring,

and keep the secondary spring from acting merely as a transmitter of itsmotion, a pawl is made to engage the stop-wheel and hold the main shaftstationary, except when it is raised by a pin upon one of thegear-wheels of the train, to allow the magazine-spring to take up thepartiafl'y exhausted drivin g-sprin g another notch. To make thedriving-spring still more independent of the magazine-sprin g as to itsuniform speed and tension, a second pawl, operated by an eccentric onone of the gear-wheels, is made to start the ratchet-wheel and mainshaft in the direction impelled by the magazine-spring by reason of themomentum of a fly-wheel. The main driving-wheel and pinion on the mainshaft, although impelled by the heavy magazine-spring, will not respondas quickly as is desirable to produce the best results, on account ofthe inertia and possible obstruction by foreign matter or a jam, and thesecond pawl, impelled by the momentum of a fly-wheel, overcomes the saidinertia or obstruction, and makes the action of themagazinespringinstantaneous for winding up the driving-spring. By reasonof this instantaneous and intermittent winding of the driving-spring,the action of the latter as to tension and speed is rendered almostentirely independent of the motive power of the magazine-spring.

Figure I is a view of machine embodying my invention. Fig. II is a viewof ratchet or stop wheel M and pawl Q. Fig. lIIis a plan view.

A is the frame of the machine, which may be made of any form required.B, O, D, and E are the shafts of the machine. B is the main shaft, onthe end of which is the pinion F, which runs loose on shaft, but isconnected to shaft by pins and clutch G. There is also a groove turnedin the boss of pinion F for a spring or fork, H, to work in and keeppinion against clutch on shaft B. A ratchet-wheel, I, having a heavyboss cast on it, is fastened to shaft B. The wheel K runs loose on shaftB, and another boss, L, which is fastened to shaft, keeps it improperposition. Itound the boss of ratchet-wheel I a strong spring, Y, iscoiled, one end of which is fastened to ratchet-wheel I, and the otherto wheelK. On boss L, attached to the main shaft, a ratchetor stopwheel, M, is firmly fastened. Wheel K has forty-eight teeth working in apinion of twelve teeth on shaft 0, and shaft 0 carries a wheel offorty-eight teeth working in a pinion of twelve on shaft D. Shaft Dcarries a wheel of forty-eight teeth working in-a pinion of twelve onshaft E. On shaft D an eccentric, O, is formed by which a pawl, P, ismade to work the ratchet-wheel I, which has sixteen teeth, thus movingthe ratchet-wheel one tooth each revolution of shaft D. Q is a pawlworking in ratchet-wheel M, which keeps ratchet-wheel I stationary when'not under the influence of pawl P and magazine-spring. The one end ofpawl is fastened to frame at R, and the other is lifted by a pin, S, inthe wheel on shaft 1). T is the shaft that carries the coiled spring Uand on which spring U is wound a wheel, X, having seventy-two teeth,and, working in pinion F, is keyed on shaft T. Z is a bar or stud onwhich the end of spring is fastened. Shaft'E on the one end carries thefly-wheel N, and on the other the pulley to for transmitting the powerof the machine. b is a wheel on the end of shaft D.

In applying my motive power, the vstrong driving-sprin g Y coiled on theboss of ratchetwheel I is wound up, and the pawl Q working inratchetwheel M keeps it so. The coiled spring U is then wound up, andalso retained in position by means of pawl Q and ratchetwheel M. Thewheels and pinions must be so calculated that when the shaft 1), whichcarries the eccentric 0, makes one revolution, the pawl P will havemoved the ratchet-wheel I one tooth; and spring Y being the driver ofthe machine, and connecting ratchet-wheel I and wheel K, the Wheel onshaftDis driven sixteen times faster than the wheel K on shaft B. ShaftE carrying fly-wheel N moves four times faster than shaft 1), and themomentum of fly-wheel carries over the eccentric O, which drives pawl Pto move ratchet-wheel I. Ratchet-wheel I being connected by spring Y towheel K, another ratchet or stop wheel, M, on

' the same shaft with ratchet-wheel I, having the pawl Q worked by a pinS in the wheel on shaft D, is used to keep ratchet-wheel I stationarywhen not under the influence of pawl P. The coiled. spring U, which isattached to and coiled round shaft T, which carries wheel X to work inpinion F, is a magazine of power to assist pawl P in throwing up ratchetI.

When more power is required, a lever, W, is used to lift pawls P and Q,and the united power of both springs Y and U is applied. A movablepulley,( l;&)to transmit the power of the machine, is placed on shaft E,and on it is fastened a wheel, 00, of equal size with awheel,

b, on shaft D, so that when the wheels are in gear the speed of thepulleyis reduced. When the machine is at its ordinary speed, the pulleyis attached to the shaft by a clutch on the end of it, and when betweenclutch and wheel I), the motion of the pulley is stopped. The

speed of the machine is regulated by a brake I claim as my invention 1.The combination of the magazine-spring U with the secondary constanttension driving-sprin g I, rigidly attached at one end to aratchet-wheel upon the main-shaft, and at the other to a loosegear-wheel, substantially as and for the purpose described.

2. The combination, with the magazinespring U and the driving-spring I,rigidly attached to the shaft at one end, and to the loose gear-wheel atthe other, of a stop-wheel, M, rigidly attached to the main shaft, apawl, Q, and the pin S upon the gear-wheel, substantially as described,for the purpose of renderin g the action of the magazine-sprin g uponthe driving-spring intermittent.

3. The combination, with the ratchet-wheel I upon the main shaft, of thepawl P, the eccentric O, and the fly-wheel N, for the purpose ofrendering the intermittent action of spring U upon I instantaneous,substantially as set forth.

4. The combination, with pawls P and Q, of a lever W, for the purpose ofallowing the machine when nearly run down to operate with both springsand continuously.

5. The combination, with a shifting-lever, of a loose pulley, at, havinga clutch upon one side and a gear-wheel upon the other, to reduce thespeed, substantially as described.

HENRY BOLTON.

Witnesses:

ALFRED J. WILKES, WILLIAM GREEN.

